4 results on '"Mardor, Israel"'
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2. A novel method for the measurement of half-lives and decay branching ratios of exotic nuclei.
- Author
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Miskun, Ivan, Dickel, Timo, Mardor, Israel, Hornung, Christine, Amanbayev, Daler, Ayet San Andrés, Samuel, Bergmann, Julian, Ebert, Jens, Geissel, Hans, Górska, Magdalena, Greiner, Florian, Haettner, Emma, Plaß, Wolfgang R., Purushothaman, Sivaji, Scheidenberger, Christoph, Rink, Ann-Kathrin, Weick, Helmut, Bagchi, Soumya, Constantin, Paul, and Kaur, Satbir
- Subjects
EXOTIC nuclei ,BRANCHING ratios ,TIME-of-flight mass spectrometers ,ALPHA decay ,ION traps ,MOTHER-daughter relationship - Abstract
A novel method for simultaneous measurement of masses, Q-values, isomer excitation energies, half-lives and decay branching ratios of exotic nuclei has been demonstrated. The method includes first use of a stopping cell as an ion trap, combining storage of mother and daughter nuclides for variable durations in a cryogenic stopping cell (CSC), and afterwards the identification and counting of them by a multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS). We utilized our method to record the decay and growth of the
216 Po and212 Pb isotopes (alpha decay) and of the119m2 Sb isomer ( t 1 / 2 = 850 ± 90 ms) and119g Sb isotope (isomer transition), obtaining half-lives consistent with literature values. The amount of non-nuclear-decay losses in the CSC up to ∼ 10 s is negligible, which exhibits its extraordinary cleanliness. For119 Sb isotopes, we present the first direct measurements of the mass of its ground state, and the excitation energy and decay branching ratios of its second isomeric state (119m2 Sb). This resolves discrepancies in previous excitation energy data, and is the first direct evidence that the119m2 Sb isomer decays dominantly via γ emission. These results pave the way for the measurement of branching ratios of exotic nuclei. [ABSTRACT FROM AUTHOR]- Published
- 2019
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3. The science case of the FRS Ion Catcher for FAIR Phase-0.
- Author
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Plaß, Wolfgang R., Dickel, Timo, Mardor, Israel, Pietri, Stephane, Geissel, Hans, Scheidenberger, Christoph, Amanbayev, Daler, Ayet San Andrés, Samuel, Äystö, Juha, Balabanski, Dimiter L., Beck, Sönke, Bergmann, Julian, Charviakova, Volha, Constantin, Paul, Eronen, Tommi, Grahn, Tuomas, Greiner, Florian, Haettner, Emma, Hornung, Christine, and Hucka, Jean-Paul
- Subjects
NEUTRON emission ,TIME-of-flight mass spectrometers ,MASS measurement ,RELATIVISTIC energy ,IONS ,NUCLIDES - Abstract
The FRS Ion Catcher at GSI enables precision experiments with thermalized projectile and fission fragments. At the same time it serves as a test facility for the Low-Energy Branch of the Super-FRS at FAIR. The FRS Ion Catcher has been commissioned and its performance has been characterized in five experiments with
238 U and124 Xe projectile and fission fragments produced at energies in the range from 300 to 1000 MeV/u. High and almost element-independent efficiencies for the thermalization of short-lived nuclides produced at relativistic energies have been obtained. High-accuracy mass measurements of more than 30 projectile and fission fragments have been performed with a multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) at mass resolving powers of up to 410,000, with production cross sections down to the microbarn-level, and at rates down to a few ions per hour. The versatility of the MR-TOF-MS for isomer research has been demonstrated by the measurement of various isomers, determination of excitation energies and the production of a pure isomeric beam. Recently, several instrumental upgrades have been implemented at the FRS Ion Catcher. New experiments will be carried out during FAIR Phase-0 at GSI, including direct mass measurements of neutron-deficient nuclides below100 Sn and neutron-rich nuclides below208 Pb, measurement of β-delayed neutron emission probabilities and reaction studies with multi-nucleon transfer. [ABSTRACT FROM AUTHOR]- Published
- 2019
- Full Text
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4. The Soreq Applied Research Accelerator Facility (SARAF): Overview, research programs and future plans.
- Author
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Mardor, Israel, Aviv, Ofer, Avrigeanu, Marilena, Berkovits, Dan, Dahan, Adi, Dickel, Timo, Eliyahu, Ilan, Gai, Moshe, Gavish-Segev, Inbal, Halfon, Shlomi, Hass, Michael, Hirsh, Tsviki, Kaiser, Boaz, Kijel, Daniel, Kreisel, Arik, Mishnayot, Yonatan, Mukul, Ish, Ohayon, Ben, Paul, Michael, and Perry, Amichay
- Subjects
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NUCLEAR physics , *EPITHERMAL neutrons , *RADIOISOTOPES , *PARTICLE accelerators , *X-ray diffraction - Abstract
The Soreq Applied Research Accelerator Facility (SARAF) is under construction in the Soreq Nuclear Research Center at Yavne, Israel. When completed at the beginning of the next decade, SARAF will be a user facility for basic and applied nuclear physics, based on a 40 MeV, 5 mA CW proton/deuteron superconducting linear accelerator. Phase I of SARAF (SARAF-I, 4 MeV, 2 mA CW protons, 5 MeV 1 mA CW deuterons) is already in operation, generating scientific results in several fields of interest. The main ongoing program at SARAF-I is the production of 30 keV neutrons and measurement of Maxwellian Averaged Cross Sections (MACS), important for the astrophysical s-process. The world leading Maxwellian epithermal neutron yield at SARAF-I (5×1010
epithermal neutrons/s), generated by a novel Liquid-Lithium Target (LiLiT), enables improved precision of known MACSs, and new measurements of low-abundance and radioactive isotopes. Research plans for SARAF-II span several disciplines: precision studies of beyond-Standard-Model effects by trapping light exotic radioisotopes, such as 6He, 8Li and 18, 19, 23Ne, in unprecedented amounts (including meaningful studies already at SARAF-I); extended nuclear astrophysics research with higher energy neutrons, including generation and studies of exotic neutron-rich isotopes relevant to the rapid (r-) process; nuclear structure of exotic isotopes; high energy neutron cross sections for basic nuclear physics and material science research, including neutron induced radiation damage; neutron based imaging and therapy; and novel radiopharmaceuticals development and production. In this paper we present a technical overview of SARAF-I and II, including a description of the accelerator and its irradiation targets; a survey of existing research programs at SARAF-I; and the research potential at the completed facility (SARAF-II). [ABSTRACT FROM AUTHOR] - Published
- 2018
- Full Text
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